add container image and github action

.github/workflows/docker.yaml

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+name: Docker
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+on:
+  push:
+    branches: [ main ]
+    # Publish semver tags as releases.
+    tags: [ 'v*.*.*' ]
+    paths:
+      - ".github/workflows/docker.yaml"
+      - "src/**"
+      - "Dockerfile"
+  pull_request:
+    branches: [ main ]
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      # Login against a Docker registry except on PR
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      # Build and push Docker image with Buildx (don't push on PR)
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image
+        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

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+FROM gcr.io/google_containers/volume-nfs:0.8
+
+COPY src/run_nfs.sh /usr/local/bin/
+
+RUN chmod 775 /usr/local/bin/run_nfs.sh

src/run_nfs.sh

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+#!/bin/bash
+
+# Copyright 2015 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+NFSROOT=/exports
+
+function start()
+{
+
+    unset gid
+    # accept "-G gid" option
+    while getopts "G:" opt; do
+        case ${opt} in
+            G) gid=${OPTARG};;
+        esac
+    done
+    shift $(($OPTIND - 1))
+
+    # prepare /etc/exports
+    mkdir $NFSROOT
+    chown root:root $NFSROOT
+    if [ -v gid ] ; then
+        chmod 777 $NFSROOT
+        chgrp $gid $NFSROOT
+    fi
+    echo "$NFSROOT *(rw,fsid=0,insecure,no_root_squash,no_wdelay)" >> /etc/exports
+
+    # start rpcbind if it is not started yet
+    /usr/sbin/rpcinfo 127.0.0.1 > /dev/null; s=$?
+    if [ $s -ne 0 ]; then
+       echo "Starting rpcbind"
+       /usr/sbin/rpcbind -w
+    fi
+
+    mount -t nfsd nfsd /proc/fs/nfsd
+
+    # -V 3: enable NFSv3
+    /usr/sbin/rpc.mountd -N 2 -V 3
+
+    /usr/sbin/exportfs -r
+    # -G 10 to reduce grace time to 10 seconds (the lowest allowed)
+    /usr/sbin/rpc.nfsd -G 10 -N 2 -V 3
+    /usr/sbin/rpc.statd --no-notify
+    echo "NFS started"
+}
+
+function stop()
+{
+    echo "Stopping NFS"
+
+    /usr/sbin/rpc.nfsd 0
+    /usr/sbin/exportfs -au
+    /usr/sbin/exportfs -f
+
+    kill $( pidof rpc.mountd )
+    umount /proc/fs/nfsd
+    echo > /etc/exports
+    exit 0
+}
+
+
+trap stop TERM
+
+start "$@"
+
+# Ugly hack to do nothing and wait for SIGTERM
+while true; do
+    sleep 5
+done